[ruby-core:109861] [Ruby master Bug#19003] TracePoint behavior inconsistency in 3.2.0-preview2

["hurricup (Alexandr Evstigneev)" <noreply@ruby-lang.org>]

Issue #19003 has been reported by hurricup (Alexandr Evstigneev).

----------------------------------------
Bug #19003: TracePoint behavior inconsistency in 3.2.0-preview2
https://bugs.ruby-lang.org/issues/19003

* Author: hurricup (Alexandr Evstigneev)
* Status: Open
* Priority: Normal
* ruby -v: ruby 3.2.0preview2 (2022-09-09 master 35cfc9a3bb) [x86_64-linux]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN
----------------------------------------
This is kind of continuation of my previous report about global/local TP processing (#18730).

Sample script:
```
def foo
  return 1
end

puts RubyVM::InstructionSequence.of(method :foo).disasm

def step_over
  TracePoint.new(:line, :return, :b_return) do |tp|
    puts "Step over hits by #{tp.event} at #{tp.lineno}"
    step_over
    tp.disable
  end.enable(target: RubyVM::InstructionSequence.of(method :foo), target_thread: Thread.current)
end

TracePoint.new(:line, :return, :b_return) do |tp|
  if tp.lineno == 2
    puts "Step into hits by #{tp.event} at #{tp.lineno}"
    step_over
    tp.disable
  end
end.enable(target_thread: Thread.current)

a = foo
```

In ruby 3.1.2 we have expected behavior. Output:
```
== disasm: #<ISeq:foo@/home/hurricup/Projects/ruby-debugger/jb-debase-30/test_sample.rb:1 (1,0)-(3,3)> (catch: FALSE)
0000 putobject_INT2FIX_1_                                             (   2)[LiCa]
0001 leave                                                            (   3)[Re]
Step into hits by line at 2
Step over hits by return at 3
```

In ruby 3.2.0-preview2 - not so much. Output:
```
== disasm: #<ISeq:foo@/home/hurricup/Projects/ruby-debugger/jb-debase-30/test_sample.rb:1 (1,0)-(3,3)> (catch: false)
0000 putobject_INT2FIX_1_                                             (   2)[LiCa]
0001 leave                                                            (   3)[Re]
Step into hits by line at 2
Step over hits by line at 2
Step over hits by return at 3
```



-- 
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